/* Calculator Navigation */
.calculator-nav {
    background: var(--header-bg);
    padding: 1rem 0;
    border-bottom: 2px solid var(--primary);
}

.calculator-nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.calc-nav-btn {
    background: none;
    color: #fff;
    border: 1px solid var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    white-space: nowrap;
}

.calc-nav-btn:hover {
    background: var(--primary);
    color: #fff;
}

.calc-nav-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* Calculator Main */
.calculator-main {
    padding: 2rem 1rem 6rem 1rem;
    min-height: 70vh;
    background: var(--bg);
}

.calculator-container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: 14px;
    box-shadow: 0 2px 12px var(--border);
    padding: 2rem;
}

.calculator-container h1 {
    font-size: 2.2rem;
    color: var(--text);
    margin-bottom: 0.5rem;
    text-align: center;
}

.calculator-description {
    color: var(--muted-text);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    text-align: center;
}

/* Calculator Form */
.calculator-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 2rem;
}

.form-section {
    background: var(--input-bg);
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid var(--input-border);
}

.form-section h3 {
    color: var(--text);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 1rem;
}

.form-group:last-child { margin-bottom: 0; }

.form-group label {
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.form-group input,
.form-group select {
    padding: 0.8rem;
    border: 2px solid var(--input-border);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.2s;
    background: var(--input-bg);
    color: var(--text);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-help { color: #6c757d; font-size: 0.85rem; margin-top: 0.25rem; }

/* Risk Level Selection */
.risk-levels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.risk-option {
    background: var(--card-bg);
    border: 2px solid var(--input-border);
    border-radius: 8px;
    padding: 1.2rem;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.risk-option:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(46,139,87,0.15);
}

.risk-option.selected {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(46,139,87,0.08) 0%, rgba(46,139,87,0.05) 100%);
    box-shadow: 0 4px 12px rgba(46,139,87,0.2);
}

.risk-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.risk-header h4 { color: var(--text); margin: 0; font-size: 1.1rem; }

.risk-percentage { background: var(--primary); color: #fff; padding: 0.3rem 0.6rem; border-radius: 4px; font-size: 0.8rem; font-weight: 600; }

.risk-option p { color: var(--muted-text); font-size: 0.9rem; margin: 0; line-height: 1.4; }

.calculate-btn {
    background: linear-gradient(90deg, var(--header-bg) 0%, var(--primary) 100%);
    color: #fff;
    border: none;
    padding: 1rem 2rem;
    border-radius: 6px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 1rem;
}

.calculate-btn:hover { background: linear-gradient(90deg, var(--primary) 0%, var(--header-bg) 100%); transform: translateY(-2px); }
.calculate-btn:disabled { background: #ccc; cursor: not-allowed; transform: none; }

/* Results */
.results-container {
    background: var(--input-bg);
    border-radius: 8px;
    padding: 1.5rem;
    border-left: 4px solid var(--primary);
    margin-bottom: 2rem;
}

.results-container h2 { color: var(--text); margin-bottom: 1.5rem; font-size: 1.8rem; text-align: center; }

.results-section {
    background: var(--card-bg);
    border-radius: 6px;
    padding: 1.2rem;
    margin-bottom: 1rem;
    border: 1px solid var(--input-border);
}

.results-section:last-child { margin-bottom: 0; }

.results-section h3 { color: var(--text); margin-bottom: 1rem; font-size: 1.2rem; border-bottom: 2px solid var(--primary); padding-bottom: 0.5rem; }

.result-item { display: flex; justify-content: space-between; align-items: center; padding: 0.8rem 0; border-bottom: 1px solid var(--input-border); }
.result-item:last-child { border-bottom: none; }
.result-label { font-weight: 600; color: var(--text); }
.result-value { font-weight: 700; color: var(--primary); font-size: 1.1rem; }

/* Tips Container */
.tips-container { background: var(--input-bg); border-radius: 8px; padding: 1.5rem; border: 1px solid var(--input-border); }
.tips-container h3 { color: var(--text); margin-bottom: 1.5rem; font-size: 1.5rem; text-align: center; }
.tips-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1rem; }
.tip-card { background: var(--card-bg); border-radius: 6px; padding: 1.2rem; border-left: 4px solid var(--primary); box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.tip-card h4 { color: var(--text); margin-bottom: 0.5rem; font-size: 1.1rem; }
.tip-card p { color: var(--muted-text); font-size: 0.9rem; line-height: 1.4; margin: 0; }

/* Responsive Design */
@media (max-width: 768px) {
    .calculator-nav-container { justify-content: flex-start; overflow-x: auto; padding: 0 0.5rem; }
    .calc-nav-btn { font-size: 0.8rem; padding: 0.4rem 0.8rem; }
    .calculator-container { padding: 1.5rem; margin: 0 0.5rem; }
    .risk-levels { grid-template-columns: 1fr; }
    .tips-grid { grid-template-columns: 1fr; }
    .result-item { flex-direction: column; align-items: flex-start; gap: 0.3rem; }
    .risk-header { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
}